---
product_id: 13295064
title: "Relationshipware StratoFins Screw-on Water Rocket Fins + Rubber Stopper Launcher"
brand: "relationshipware"
price: "¥6843"
currency: JPY
in_stock: true
reviews_count: 3
category: "Relationshipware"
url: https://www.desertcart.jp/products/13295064-relationshipware-stratofins-screw-on-water-rocket-fins-rubber-stopper-launcher
store_origin: JP
region: Japan
---

# Fits 2L soda bottles & smaller No tools or glue needed 95% launcher compatibility Relationshipware StratoFins Screw-on Water Rocket Fins + Rubber Stopper Launcher

**Brand:** relationshipware
**Price:** ¥6843
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your launch game—because your rocket deserves the StratoFins edge!

## Quick Answers

- **What is this?** Relationshipware StratoFins Screw-on Water Rocket Fins + Rubber Stopper Launcher by relationshipware
- **How much does it cost?** ¥6843 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/13295064-relationshipware-stratofins-screw-on-water-rocket-fins-rubber-stopper-launcher)

## Best For

- relationshipware enthusiasts

## Why This Product

- Trusted relationshipware brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Complete Launch Kit:** Includes 3 fins, attachment ring, rubber stopper launcher, and detailed instructions for instant launch success.
- • **Effortless Assembly:** Screw-on design means zero tools or glue—get your rocket flight-ready in minutes.
- • **Versatile & Educational:** Perfect for science projects, parties, or weekend fun—ignite curiosity and impress your crew.
- • **Precision Flight Control:** Durable plastic fins ensure straight, stable flights that outshine tumbling rockets.
- • **Universal Launcher Compatibility:** Works seamlessly with 95% of all launchers, homemade or commercial—upgrade anytime without hassle.

## Overview

The Relationshipware StratoFins Screw-on Water Rocket Fins kit upgrades 2-liter soda bottle rockets with durable, screw-on fins compatible with 95% of launchers. No tools or glue required, it includes 3 fins, an attachment ring, a rubber stopper launcher, and instructions, delivering stable, high-flying water rocket experiences ideal for educational and recreational use.

## Description

StratoFins will guide your rocket to lofty heights with straight flights instead of tumbling through the air. StratoFins are made of durable plastic and screw-on to a 2 liter soda bottle or smaller. This version ships with a rubber stopper launcher for a complete economical package. These fins are compatible with 95% of all available launchers either homemade or commercially available in the marketplace if you want to upgrade the launcher at a later time. StratoFins requires no tools or glue for assembly. The StratoFins kit includes 1 attachment ring, 3 fins, 1 rubber stopper launcher along with an instruction sheet that provides information for creating a nose cone and several launching tips. Assemble StratoFins by sliding each fin down a separate slot on the attachment ring beginning from the top. With all fins in place screw the attachment ring onto a soda bottle until snug. This water rocket can be launched with or without a parachute attached since this configuration does not nose dive, but instead tumbles gently back to the ground provided the nose cone is not permanently attached. Great item for people of all ages for fun, science projects, school classes, parties, etc.

Review: Five Stars - Great
Review: This breaks easily - The fins break easily, and I have not found any adhesive to repair them. Tried several different adhesives and nothing works.

## Features

- Compatible with 95% of all available launchers either homemade or commercially available.
- Works with various styles: cable ties, rubber stopper, expanding tube, nozzle, or O-ring.
- No tools or glue required for assembly, simply screw-on to a 2 liter soda bottle or smaller.
- Take your water rocketry to the next level of higher flights with screw-on StratoFins.
- StratoFins Plus kit includes 1 ring, 3 fins, 1 rubber stopper launcher along with an instruction sheet.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C8LJ7YE |
| Customer Reviews | 4.4 4.4 out of 5 stars (15) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2 ounces |
| Manufacturer | Relationshipware |
| Manufacturer recommended age | 14 years and up |
| Product Dimensions | 3.5 x 1.5 x 5.5 inches |

## Images

![Relationshipware StratoFins Screw-on Water Rocket Fins + Rubber Stopper Launcher - Image 1](https://m.media-amazon.com/images/I/51Z+udz0MCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Five Stars
*by W***Y on July 30, 2017*

Great

### ⭐⭐⭐ This breaks easily
*by B***A on July 12, 2024*

The fins break easily, and I have not found any adhesive to repair them. Tried several different adhesives and nothing works.

### ⭐⭐⭐⭐⭐ Five Stars
*by A***E on April 7, 2015*

awesome product

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/13295064-relationshipware-stratofins-screw-on-water-rocket-fins-rubber-stopper-launcher](https://www.desertcart.jp/products/13295064-relationshipware-stratofins-screw-on-water-rocket-fins-rubber-stopper-launcher)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-01*